Error: Index signature for type 'string' is missing in type 'someInterface'. Because `interface` can be re-opened
Didn't understand at first:
How is it because interface
can be re-opened?
Found the answer here: https://hyp.is/Nyiq5js7Eey8Gpe0OK6smQ/stackoverflow.com/questions/67184371/type-session-is-not-assignable-to-type-recordstring-unknown